"The Gelid Tranquillo 4 is built around four 16mm diameter copper heatpipes, a stack of ~40 nickel plated aluminum fins and a very unremarkable 1600rpm,
120mm PWM fan. The heatsink makes use of 'exposed heatpipe base'
thermal design."continue »

The Gigabyte G-Power Pro heatsink is a radical design that works very well at medium to high fan speeds. The heatsink is designed to work on AMD Athlon64 socket 754/939/940, Intel Pentium 4 socket 775/478, and AMD K7 socket 462/A/370 processors.

The heatsink at first appears to be
nothing more than a plain aluminum skived heatsink, but closer examination
reveals a couple very effective innovations, not the least of which are
the V-shaped fins.